PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

872-1Restrictor Unit,fluid Flow

H O Trerice Co · NSN 4730-00-326-2443 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-326-2443 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-326-2443. Primary manufacturer part number: 872-1.
Features
  • Restrictor Unit,fluid Flow — FSC 4730
  • Material: COPPER ALLOY FILTER
  • Material: COPPER ALLOY BODY
  • Thread Series: NPT FIRST CONNECTION
  • Strainer Type and Quantity: 1 FILTER
  • End Connection Type: THREADED FEMALE FIRST CONNECTION
  • Thread Size Designator: 1/4-18 SECOND CONNECTION
  • Thread Series: NPT SECOND CONNECTION
Applications
  • Applications requiring Copper Alloy Filter construction
General Description

The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-00-326-2443, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is H O Trerice Co. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-326-2443
Primary Part Number872-1
Item NameRestrictor Unit,fluid Flow
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerH O Trerice Co
StatusACTIVE
MaterialCOPPER ALLOY FILTER
MaterialCOPPER ALLOY BODY
Thread SeriesNPT FIRST CONNECTION
Strainer Type and Quantity1 FILTER
End Connection TypeTHREADED FEMALE FIRST CONNECTION
Thread Size Designator1/4-18 SECOND CONNECTION
Thread SeriesNPT SECOND CONNECTION
Design TypeSTRAIGHT
Thread Size Designator1/4-18 FIRST CONNECTION
Thread DirectionRIGHT-HAND FIRST CONNECTION
End Connection Component Type and Size for Which Designed1/4 IN.PIPE IN
End Connection SimilarityNOT IDENTICAL
Thread Class2A SECOND CONNECTION A
Width Across Flats0.750 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND SECOND CONNECTION
End Connection TypeTHREADED MALE, TAPERED PIPE SECOND CONNECTION
Orifice Diameter0.312 INCHES NOMINAL IN
Thread Class2B FIRST CONNECTION
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-151-95608721 INTERCHANGEABLE
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4820-00-238-6473 INTERCHANGEABLE
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5935-00-259-44158721 INTERCHANGEABLE
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Western Union Telegraph Co Sub of Western Union Corp
5360-00-446-8827D15-792JPC607 INTERCHANGEABLE
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Northrop Grumman Systems Corporation Div Marine Systems
5305-00-738-07168721 INTERCHANGEABLE
Screw,shoulder
Circor Aerospace, Inc. Div Circor
5975-00-925-9314 INTERCHANGEABLE
Box Connector,electrical
5895-01-101-62988721 INTERCHANGEABLE
Divider,power,radio Frequency
Marc Alan Group the, Inc
5360-01-111-791175-LM INTERCHANGEABLE
Spring,helical,compression
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
5930-01-114-70598721 INTERCHANGEABLE
Switch,rotary
Electro Impulse Laboratory Inc Dba Electro Impulse Inc
5120-01-128-30567907108-00 INTERCHANGEABLE
Alignment Tool,electronic Equipm
Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan
Cross-Reference Index
Part NumberManufacturer
872-1 H O Trerice Co (USA)
Related Parts
3110-00-151-9560INTERCHANGEABLE
BEARING,ROLLER,TAPERED
8721
4820-00-238-6473INTERCHANGEABLE
VALVE,SAFETY RELIEF
5935-00-259-4415INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
8721
5360-00-446-8827INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
D15-792JPC607
5305-00-738-0716INTERCHANGEABLE
SCREW,SHOULDER
8721
5975-00-925-9314INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
5895-01-101-6298INTERCHANGEABLE
DIVIDER,POWER,RADIO FREQUENCY
8721
5360-01-111-7911INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
75-LM
5930-01-114-7059INTERCHANGEABLE
SWITCH,ROTARY
8721
5120-01-128-3056INTERCHANGEABLE
ALIGNMENT TOOL,ELECTRONIC EQUIPM
7907108-00
4820-01-131-5917INTERCHANGEABLE
VALVE,SAFETY RELIEF
E8721KM51M
4820-01-278-5587INTERCHANGEABLE
STEM,FLUID VALVE
8721

Frequently Asked Questions

What is NSN 4730-00-326-2443?

NSN 4730-00-326-2443 is a Restrictor Unit,fluid Flow, manufactured by H O Trerice Co, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-326-2443?

NSN 4730-00-326-2443 has 1 cross-referenced part number: 872-1 (H O Trerice Co).

What NSN replaces 4730-00-326-2443?

There are 12 known substitutes for 4730-00-326-2443: 3110-00-151-9560, 4820-00-238-6473, 5935-00-259-4415 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 872-1?

Key specifications for 872-1: Material: COPPER ALLOY FILTER; Material: COPPER ALLOY BODY; Thread Series: NPT FIRST CONNECTION; Strainer Type and Quantity: 1 FILTER. 19 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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